Went through the past few days of bugs. Most of my bugs have been noted by others. But there's a few that I didn't see mentioned.
1) Rapidly inserting items into the recycler makes them invisibly stack in front of it. The bots notice them and can pick them up and restore them. Or saving and loading will restore them.
1b) Placing a bot that is holding items into the recycler permanently deletes the items he is holding.
2) I saw a post about cereal crops that get stuck. But I have it happen with trees as well, didn't see anyone mention this. Can't interact with it. Saving and Loading causes the stuck trees to become invisible. I'm not sure how to reproduce this but it seems to happen when you or the bot doesn't finish harvesting the tree. (I did get some buggy behavior trying to recreate this one, telling the bot to stop chopping the tree when he is in the middle and trying to pick him up. He would get caught in a loop chopping the tree until you tell him to stop.) I saw this in occur in a YouTube let's play of it, so it's probably pretty common, I can get you the video and time stamp if interested.
3) Quasi-bug: some weird scripting stuff that's not intuitive. For instance if you teach to get something from a general storage, it has 2 commands, move to general storage, take from general storage. In reality it seems to be "move to selected general storage", "take from selected general storage" as you can't mix and match. In contrast something like a stick seems to be "select nearest stick", "go to selected item", "pick up selected item" The gui doesn't communicate this at all and took me a bit to troubleshoot what was going on. It seems to work better if you don't move commands around much.
4) Minor bug, if you pick up the bot while teaching him it messes up the gui, you can't place loops. Though the bot continues receiving instructions.
5) The bots don't make a check after selecting an item that the items still exist or is nearby when they get there (at least with some commands). For instance if they are to chop a plank into poles. If you pick up the plank they selected and walk off, they get turned into poles anyway (where the plank was before you picked it up) and you are left with an invisible plank in your hand that you need to drop (can be used to duplicate items). If you chop the plank first, they get stuck into a infinite chopping nothing loop. Amusingly, the axe continues the chopping animation even when taken from the bot.
That's all I can think of right now. Pretty fun little game, excited to see what you do with it. And looking forward to seeing some of the updates that you have mentioned, explicit work areas, more conditional statements, etc. I also find myself wanting more ways to input instructions, maybe choose from a list. Or copy and paste instructions into and out of a notebook or something would be nice.
Anyway, hope that's helpful and good luck!